JPS59204429A - Power source control circuit - Google Patents
Power source control circuitInfo
- Publication number
- JPS59204429A JPS59204429A JP58077815A JP7781583A JPS59204429A JP S59204429 A JPS59204429 A JP S59204429A JP 58077815 A JP58077815 A JP 58077815A JP 7781583 A JP7781583 A JP 7781583A JP S59204429 A JPS59204429 A JP S59204429A
- Authority
- JP
- Japan
- Prior art keywords
- secondary battery
- circuit
- voltage
- charging
- mode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S320/00—Electricity: battery or capacitor charging or discharging
- Y10S320/10—Nonbattery load controls charging
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S320/00—Electricity: battery or capacitor charging or discharging
- Y10S320/14—Battery acts as buffer
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
く技術分野〉
本発明は、二次電池及び外部電源を電源とする機器に於
いて、二次電池と機器の負荷に対して適宜電源を供給す
る電源制御回路に関するものである。[Detailed Description of the Invention] [Technical Field] The present invention relates to a power supply control circuit that appropriately supplies power to the load of the secondary battery and the equipment in equipment that uses a secondary battery and an external power source as power sources. It is.
〈従来技術〉
一般に二次電池とＡＣアダプターを電源とする機器にお
いては、携帯時に二次電池を使用し、ＡＣ電源のある場
所でＡＣアダプターを用いて機器を使用することができ
る。そして、二次電池が放電すれば、そのＡＣアダプタ
ーによって充電するが、二次電池を機器より取りはずし
て専用充電器で充電し、携帯時の使用に備える。<Prior Art> Generally, in devices that use a secondary battery and an AC adapter as power sources, the device can be used while carrying the device using the secondary battery and using the AC adapter in a place where an AC power source is available. When the secondary battery is discharged, it is charged using the AC adapter, but the secondary battery is removed from the device and charged using a dedicated charger, in preparation for portable use.
前者の充電方法は機器にＡＣアダプターを接続して機器
本体内に装着された二次電池を充電する方法であるが、
機器の動作時においてはトリクル充電を行うため長い充
電時間を必要とする。また、たとえ機器を動作させない
状態でも充電時間はそれ程短縮されない。The former charging method involves connecting an AC adapter to the device and charging the secondary battery installed inside the device.
When the device is in operation, trickle charging is performed, which requires a long charging time. Furthermore, even when the device is not in operation, the charging time is not significantly reduced.
後者の充電方法は充電するごとに二次電池を機器本体よ
り取りはずさねばならず、携帯型機器の携帯性の利点を
半減させてしまう、といった問題があった。The latter charging method has the problem that the secondary battery must be removed from the device body each time it is charged, which reduces the portability advantage of portable devices by half.
また、上記従来のトリクル充電法によれば、二次電池の
放電状態によっては充電電流が流れ過ぎ、負荷に電流が
供給されなくなるばかりか、ＡＣアダプターにとって過
負荷となりＡＣアダプターが破損されるといった危険も
あり、これを防止するためＡＣアダプターの電流容量に
大幅な余裕をもたせなければならず大型化するといった
問題があった。また、ＡＣアダプターの電流容量に余裕
をもたさず、過電流防止回路を組込む方法もあるが、二
次電池への充電電流が大きい場合は、負荷へ供給するこ
とのできる電流が通常より少ない段階で過電流防止回路
が作動してしまうといった問題もある。Furthermore, according to the conventional trickle charging method, depending on the discharge state of the secondary battery, too much charging current flows, which not only prevents current from being supplied to the load, but also poses a risk of overloading the AC adapter and damaging the AC adapter. In order to prevent this, the AC adapter must have a large margin in current capacity, resulting in an increase in size. Another method is to incorporate an overcurrent prevention circuit without leaving a margin in the current capacity of the AC adapter, but if the charging current to the secondary battery is large, the current that can be supplied to the load is lower than usual. There is also the problem that the overcurrent prevention circuit is activated at this stage.
〈本発明の目的〉
本発明の目的は叙述の従来欠点を解消することであり、
とくに二次電池を機器本体内に装着したまま強制充電及
びトリクル充電を選択的に行う事を可能とし、また、充
電すべき二次電池の放電状態にかかわらず適宜充電し、
負荷への電流供給も問題なく行う様にしたことである。<Object of the present invention> The object of the present invention is to eliminate the conventional drawbacks of description,
In particular, it is possible to selectively perform forced charging and trickle charging while the secondary battery is installed in the device body, and to charge the secondary battery appropriately regardless of the discharge state of the secondary battery to be charged.
This also ensures that current is supplied to the load without any problems.
〈原理的構成の説明〉
第１図は本発明の原理的な電源制御回路を有する機器の
構成図である。<Description of the principle structure> FIG. 1 is a block diagram of a device having a power supply control circuit according to the present invention.
同図に於て、１は商用交流電源、２は機器本体、３はＡ
Ｃアダプターである。４は定電圧回路、５出力される制
御信号に従ってスイッチングするゲートである。５と７
か共にオン状態であれば、ＡＣアダプターより機器に供
給された電圧が４によって定電圧化され、負荷６に供給
される。８は二次電池であり、定電圧化回路４の出力電
圧によって充電される。９は制御回路であり、モードス
イッチ１０の状態に応じてゲート７及び参照電圧切替回
路１１を制御する。モードスイッチ１０が強制充電モー
ドにある場合、ゲート７をオフ状態にし、また参照電圧
切替回路１１が低い参照電圧を定電圧化回路４へ印加す
る様に制御する。これにより、電源スィッチ５の状態に
かかわらず、負荷６への電源はしゃ断され、また、定電
圧化回路４は通常より高い電圧を出力する。従って、４
より出力される電流はすべて二次電池８の充電電流とな
り、短時間に充電が完了する。モードスイッチ１０が通
常モードにある場合、ゲート７をオンし、また参照電圧
切替回路１１が通常の参照電圧を定電圧化回路４へ印加
する様に制御する。これにより、電源スィッチ５の状態
に応じて、負荷６へ電源が供給或いはしゃ断され、また
定電圧化回路４は通常の電圧を出力する。従って、４よ
り出力される電流は二次電池に対してはトリクル充電さ
れる。In the figure, 1 is the commercial AC power supply, 2 is the device itself, and 3 is the A
It is a C adapter. 4 is a constant voltage circuit, and 5 is a gate that switches according to an output control signal. 5 and 7
If both are on, the voltage supplied to the device from the AC adapter is made constant by 4 and supplied to the load 6. A secondary battery 8 is charged by the output voltage of the voltage regulating circuit 4. A control circuit 9 controls the gate 7 and the reference voltage switching circuit 11 according to the state of the mode switch 10. When the mode switch 10 is in the forced charging mode, the gate 7 is turned off, and the reference voltage switching circuit 11 is controlled to apply a low reference voltage to the constant voltage circuit 4. As a result, the power supply to the load 6 is cut off regardless of the state of the power switch 5, and the voltage regulating circuit 4 outputs a higher voltage than usual. Therefore, 4
All of the current output from the secondary battery 8 becomes a charging current for the secondary battery 8, and charging is completed in a short time. When the mode switch 10 is in the normal mode, the gate 7 is turned on and the reference voltage switching circuit 11 is controlled to apply the normal reference voltage to the voltage regulating circuit 4. As a result, power is supplied or cut off to the load 6 depending on the state of the power switch 5, and the voltage regulating circuit 4 outputs a normal voltage. Therefore, the current output from 4 trickle charges the secondary battery.
尚、１２は機器内部より発生されるブレイク信号であり
、この信号が発生すれば、９はゲート７をオフし、これ
によって、スイッチ５の状態にかかわらず電源がオフさ
れる。１３は二次電池の過放電検出回路より出力される
信号であり、９はこの信号によって、やはりゲート７を
オフする。Note that 12 is a break signal generated from inside the device, and when this signal is generated, 9 turns off the gate 7, thereby turning off the power regardless of the state of the switch 5. 13 is a signal output from the over-discharge detection circuit of the secondary battery, and 9 also turns off the gate 7 based on this signal.
第２図は具体的回路例を示す図である。FIG. 2 is a diagram showing a specific example of the circuit.
１４はチョッパ一方式による定電圧化制御回路であり、
ＡＣアダプターより入力された電圧Ｖ■がＴＲＩのスイ
ッチングによって定電圧化される。14 is a constant voltage control circuit using one chopper type;
The voltage V* inputted from the AC adapter is made constant by the switching of the TRI.
１４はこのトランジスタＴＲＩのスイッチング制御を行
う回路であり、０点の電位を参照電圧として定電圧化す
る。１８はＤＣ−ＤＣコンバータ、１７はその他励発振
回路である。ＶＯＩ、ＶＯ２，ＶＯ３はコンバータ出力
である。この発振回路１７はＴＲ７がオン状態の時発振
し、オフ状態で発振を停止する。ＴＲ７は第１図で示し
たゲート７に相当するが、コンバータ１８への電力供給
はｄ点より行われ、ＴＲ７は発振回路１７の発振制御を
行うのみである。Reference numeral 14 denotes a circuit that performs switching control of this transistor TRI, and uses the potential at the 0 point as a reference voltage to make it a constant voltage. 18 is a DC-DC converter, and 17 is another excitation oscillation circuit. VOI, VO2, and VO3 are converter outputs. This oscillation circuit 17 oscillates when TR7 is on, and stops oscillating when TR7 is off. TR7 corresponds to gate 7 shown in FIG. 1, but power is supplied to converter 18 from point d, and TR7 only controls oscillation of oscillation circuit 17.
モードスイッチ１０がａ側にある場合、強制充電モード
となる。つまり、モードスイッチ１０がａ側にある場合
、ＴＲ３のベース電位が上がりＴＲ３がオンする。従っ
て、０点の電位が下がり、制御回路１４はｅ点の電圧を
通常より高い電圧を発生スべ（ＴＲＩのスイッチング制
御を行う。When the mode switch 10 is on the a side, the forced charging mode is entered. That is, when the mode switch 10 is on the a side, the base potential of TR3 increases and TR3 is turned on. Therefore, the potential at point 0 decreases, and the control circuit 14 generates a voltage at point e higher than normal (performs TRI switching control).
１６は二次電池の電圧或いはｅ点の電圧を検出し、二次
電池の過放電状態検出或いはスイッチ１０がａ側にある
ことを検知する回路である。16 is a circuit that detects the voltage of the secondary battery or the voltage at point e, and detects the over-discharge state of the secondary battery or the fact that the switch 10 is on the a side.
モードスイッチ１０がａ側にあれば、１６はＴＲ４のベ
ース電圧を下げる。従って、ＴＲ４がオフ、これにとも
ないＴＲ５，ＴＲ６，ＴＲ７が夫々オフとなる。これに
よりスイッチ５の状態にかかわらず機器本体への電源供
給はしゃ断される。When the mode switch 10 is on the a side, 16 lowers the base voltage of TR4. Therefore, TR4 is turned off, and TR5, TR6, and TR7 are accordingly turned off. As a result, the power supply to the main body of the device is cut off regardless of the state of the switch 5.
モードスイッチＩＯがｂ側にあれば、ＴＲ３のベース電
圧が下がりＴＲ３はオフする。従って、０点の電位か−
にかり通常の参照電圧となる。これにより制御回路１４
はｅ点に通常電圧が印加される様にＴＲＩのスイッチン
グを制御する。一方１６は正常な電圧かｅ点に供給され
ていることを検知し、ＴＲ４をオンさせる。通常、１２
のブレーク信号はＧＮＤ電位であるため、これによりＴ
Ｒ５゜ＴＲ６，ＴＲ７は夫々オンする。従って、スイッ
チ５がオンされれば機器に電源が供給される。尚、モー
ドスイッチ１０がｂ側にあっても二次電池の電圧が所定
値以下となれば、］６はこれを検出し結果的にＴ Ｒ，
７をオフさせる。この場合の１６より出力される信号が
第１図で示した信号１３に相当する。If the mode switch IO is on the b side, the base voltage of TR3 decreases and TR3 is turned off. Therefore, the potential at the 0 point -
This becomes the normal reference voltage. As a result, the control circuit 14
controls the switching of TRI so that a normal voltage is applied to point e. On the other hand, 16 detects that a normal voltage is being supplied to point e and turns on TR4. Usually 12
Since the break signal of is at GND potential, this causes T
R5°TR6 and TR7 are each turned on. Therefore, when the switch 5 is turned on, power is supplied to the device. Note that even if the mode switch 10 is on the b side, if the voltage of the secondary battery is below a predetermined value, ]6 detects this and as a result, T R,
Turn off 7. The signal output from 16 in this case corresponds to signal 13 shown in FIG.
１５は二次電池の充電電流が所定値以下に低下したこと
を検出する回路である。具体的には、１５はｆ点の電位
か所定値以下になったことを検知し、ＴＲ２をオンさせ
る。従って、モードスイッチｌＯがａ側（強制充電モー
ド）にあって、ＴＲ３がオンしていたとしても、ＴＲ２
がオンとなることによって、ＴＲ３はオフされ、Ｃ点は
通常モードにおける電位になる。従って、強制充電モー
ドで放置したとしても、二次電池の充電が完了した時点
で強制充電は解除される。15 is a circuit that detects that the charging current of the secondary battery has fallen below a predetermined value. Specifically, the circuit 15 detects that the potential at point f has become below a predetermined value, and turns on TR2. Therefore, even if the mode switch IO is on the a side (forced charging mode) and TR3 is on, TR2
By turning on, TR3 is turned off, and point C becomes the potential in the normal mode. Therefore, even if the battery is left in forced charging mode, forced charging will be canceled when charging of the secondary battery is completed.
尚、ＴＨはサーミスタであり、周囲温度に応じてＣ点の
参照電圧を制御するためのものである。Note that TH is a thermistor for controlling the reference voltage at point C according to the ambient temperature.
〈他の実施例〉
第３図は、第１図に示した電源回路に対して、２つのモ
ードにおける制御をより有効に行う一例を示したもので
ある。第１図と異なる点は、定電圧回路４の出力に電流
リミッタ回路１９を挿入し、で行う様にした点である。<Other Embodiments> FIG. 3 shows an example in which the power supply circuit shown in FIG. 1 is more effectively controlled in two modes. The difference from FIG. 1 is that a current limiter circuit 19 is inserted into the output of the constant voltage circuit 4, so that the current limiter circuit 19 is inserted into the output of the constant voltage circuit 4.
今、モードスイッチ１０が通常モードにある場合、４よ
り通常の定電圧が出力され、二次電池８はトリクル充電
される。この時、リミッタ２０が９・より出力される信
号により有効化されている。Now, when the mode switch 10 is in the normal mode, a normal constant voltage is output from 4, and the secondary battery 8 is trickle charged. At this time, the limiter 20 is enabled by the signal output from 9.
従って、もし充電電流が所定値具−にとなればＩＪ ミ
ッタが作動し、充電電流が制限される。Therefore, if the charging current reaches a predetermined value, the IJ emitter is activated and the charging current is limited.
第４図（１）は通常モードの定電圧回路４の電流電圧特
性を示すものである。充電電流は１３以上でリミッタ２
０が作動する。一方、リミッタ１９は電流１１以上で作
動する。例えば二次電池の放電状態が甚だしい状態のま
ま、通常モードで機器を使用した場合、二次電池の充電
電流が１３以上となりリミッタ２０が作動する。もし、
リミッタ２０が無ければ、定電圧回路４より出力される
電流、つまり充電電流と負荷６へ流れる電流の和カ月１
を超えてしまい、リミッタ１９が作動し、充電ができな
いばかりか機器も使用できないことになる。FIG. 4(1) shows the current-voltage characteristics of the constant voltage circuit 4 in the normal mode. If the charging current is 13 or more, limiter 2
0 is activated. On the other hand, the limiter 19 operates at a current of 11 or more. For example, if the device is used in normal mode with the secondary battery still in a severely discharged state, the charging current of the secondary battery becomes 13 or more and the limiter 20 is activated. if,
Without the limiter 20, the current output from the constant voltage circuit 4, that is, the sum of the charging current and the current flowing to the load 6, is 1 month.
If the battery voltage exceeds the limiter 19, the limiter 19 will be activated, and not only will charging not be possible, but the device will not be able to be used.
また、リミッタ１９も無ければＡＣアダプター３に定格
以上の過電流が流れる危険がある。Furthermore, if there is no limiter 19, there is a risk that an overcurrent exceeding the rated value will flow through the AC adapter 3.
モードスイッチ１０が強制充電モードにある場合、定電
圧回路４より強制充電電圧が出力される様に、９′は電
圧切替回路１１を制御するとともに、ゲート７をオフし
、またリミッタ２０を無効化する。従って、充電電流は
１３以上流すことができる。When the mode switch 10 is in forced charging mode, 9' controls the voltage switching circuit 11, turns off the gate 7, and disables the limiter 20 so that the forced charging voltage is output from the constant voltage circuit 4. do. Therefore, the charging current can flow 13 or more.
第４図（２）は強制充電モードにおける特性を示すまた
、充電電流が低くなり、■２以下になれば、前記実施の
如く信号１３が発生し、定電圧回路４の出力電圧はトリ
クル充電電圧■１になる。FIG. 4 (2) shows the characteristics in the forced charging mode. Furthermore, when the charging current becomes low and becomes less than 2, the signal 13 is generated as in the above implementation, and the output voltage of the constant voltage circuit 4 becomes the trickle charging voltage. ■Becomes 1.
〈効 果〉
以」−説明したように、本発明によれば二次電池を必要
に応したモードで充電することができる。<Effects> As described above, according to the present invention, a secondary battery can be charged in a mode according to necessity.
第１図は本発明の原理的な電源制御回路を有する機器の
構成図、第２図は第１図の具体的回路例を示す図、第３
図は他の実施例を示す図、第４図は第３図の動作特性を
示す図である。
１ 商用交流電源、２：機器本体、３：ＡＣアダプター
、４゛定電圧回路、５：電源スィッチ、６ 負荷、７−
ゲート、８；二次電池。Fig. 1 is a configuration diagram of a device having the principle power supply control circuit of the present invention, Fig. 2 is a diagram showing a specific circuit example of Fig. 1, and Fig. 3 is a diagram showing a specific example of the circuit shown in Fig. 1.
The figure shows another embodiment, and FIG. 4 is a diagram showing the operating characteristics of FIG. 3. 1 Commercial AC power supply, 2: Equipment body, 3: AC adapter, 4 Constant voltage circuit, 5: Power switch, 6 Load, 7-
Gate, 8; secondary battery.
Claims (1)
負荷への電源供給を実質的にしゃ断し、外部電源により
二次電池を強制充電するモードと、負荷への電源供給と
ともに二次電池をトリクル充電するモードとを選択的に
切替えられる様にしたことを特徴とする電源制御回路。1. For products powered by secondary batteries and external power sources,
It is possible to selectively switch between a mode in which the power supply to the load is effectively cut off and the secondary battery is forcibly charged by an external power supply, and a mode in which the secondary battery is trickle charged while supplying power to the load. A power supply control circuit featuring:
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58077815A JPS59204429A (en) | 1983-04-30 | 1983-04-30 | Power source control circuit |
| US06/604,009 US4631468A (en) | 1983-04-30 | 1984-04-26 | Battery charging circuit for electronic apparatus |
| DE19843415573 DE3415573A1 (en) | 1983-04-30 | 1984-04-26 | BATTERY CHARGER FOR AN ELECTRONIC DEVICE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58077815A JPS59204429A (en) | 1983-04-30 | 1983-04-30 | Power source control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59204429A true JPS59204429A (en) | 1984-11-19 |
Family
ID=13644517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58077815A Pending JPS59204429A (en) | 1983-04-30 | 1983-04-30 | Power source control circuit |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4631468A (en) |
| JP (1) | JPS59204429A (en) |
| DE (1) | DE3415573A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61218330A (en) * | 1985-03-25 | 1986-09-27 | 沖電気工業株式会社 | Charging of storage battery |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3801303A1 (en) * | 1988-01-19 | 1989-07-27 | Kress Elektrik Gmbh & Co | Charger for accumulators (battery charger) |
| GB2242793B (en) * | 1990-04-05 | 1994-08-10 | Technophone Ltd | Battery charging apparatus |
| DE4023976C2 (en) * | 1990-07-25 | 1999-06-24 | Eastman Kodak Co | Portable electrical device with energy storage elements |
| JP2840415B2 (en) * | 1990-09-13 | 1998-12-24 | キヤノン株式会社 | Charging device |
| US5038093A (en) * | 1990-09-27 | 1991-08-06 | Gates Energy Products, Inc. | Rechargeable cell terminal configuration and charging device |
| DE4036479A1 (en) * | 1990-11-15 | 1992-05-21 | Gimelli Produktions Ag | Battery-operated electrical device e.g. tooth-brush, screwdriver, torch - has battery charge sensor preventing total drainage of sec. cell battery |
| FI109567B (en) * | 1991-02-25 | 2002-08-30 | Nokia Corp | Quick charging device |
| JP2935311B2 (en) * | 1992-07-24 | 1999-08-16 | 関西日本電気株式会社 | Charging circuit |
| GB2279827B (en) * | 1993-06-02 | 1998-01-07 | Vtech Communications Ltd | Alternative power supply apparatus |
| US6326767B1 (en) | 1999-03-30 | 2001-12-04 | Shoot The Moon Products Ii, Llc | Rechargeable battery pack charging system with redundant safety systems |
| TWI286212B (en) * | 2004-11-03 | 2007-09-01 | Mediatek Inc | Battery detecting system |
| KR100713850B1 (en) * | 2005-09-28 | 2007-05-07 | 삼성전자주식회사 | Battery pack, portable electronic apparatus, and control method thereof |
| US9071073B2 (en) * | 2007-10-04 | 2015-06-30 | The Gillette Company | Household device continuous battery charger utilizing a constant voltage regulator |
| CN204145050U (en) * | 2014-07-02 | 2015-02-04 | 艾默生电气公司 | The controller used in environmental control system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4820343U (en) * | 1971-07-20 | 1973-03-08 | ||
| JPS5631332A (en) * | 1979-08-22 | 1981-03-30 | Hitachi Ltd | Dc power source |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3214670A (en) * | 1961-10-16 | 1965-10-26 | Schaf Jack | Apparatus for simultaneously charging a battery and operating a timer motor |
| US3344899A (en) * | 1963-04-22 | 1967-10-03 | Scm Corp | Portable data transferring machines operable from either dc or ac current |
| US3521142A (en) * | 1967-11-13 | 1970-07-21 | Heath Co | Power supply system for portable television receiver |
| US4152635A (en) * | 1977-07-14 | 1979-05-01 | Research Development Systems, Inc. | Battery charger |
| US4233553A (en) * | 1978-05-10 | 1980-11-11 | Ault, Inc. | Automatic dual mode battery charger |
-
1983
- 1983-04-30 JP JP58077815A patent/JPS59204429A/en active Pending
-
1984
- 1984-04-26 US US06/604,009 patent/US4631468A/en not_active Expired - Lifetime
- 1984-04-26 DE DE19843415573 patent/DE3415573A1/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4820343U (en) * | 1971-07-20 | 1973-03-08 | ||
| JPS5631332A (en) * | 1979-08-22 | 1981-03-30 | Hitachi Ltd | Dc power source |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61218330A (en) * | 1985-03-25 | 1986-09-27 | 沖電気工業株式会社 | Charging of storage battery |
| JPH0449333B2 (en) * | 1985-03-25 | 1992-08-11 | Oki Electric Ind Co Ltd |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3415573A1 (en) | 1984-11-08 |
| US4631468A (en) | 1986-12-23 |
| DE3415573C2 (en) | 1988-08-04 |
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